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In a Fresnel biprism experiment, the two positions of lens give separation between the slits as 16 cm and 9 cm respectively. What is the actual distance of separation?
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- 12.5 cm
- 12 cm
- 13 cm
- 14 cm
Correct Option: B
Separation between slits are (r1= 16) cm and (r2= 9) cm.
Actual distance of separation
√r1r2 = √16 × 9 = 12 cm
